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ACCRUED EXPENSES (Tables)
3 Months Ended
Mar. 31, 2019
ACCRUED EXPENSES [Abstract]  
Accrued Expenses
Accrued expenses as of March 31, 2019 and December 31, 2018 consisted of the following (in thousands):

  
March 31, 2019
  
December 31, 2018
 
Salaries and related costs
 
$
21,131
  
$
21,726
 
Credit balances due to patients and payors
  
7,662
   
7,293
 
Group health insurance claims
  
2,815
   
3,124
 
Other
  
7,629
   
6,350
 
Total
 
$
39,237
  
$
38,493